Pressure-induced Superconductivity in BiS2-based Superconductors Eu2SrBi2S2.5Se1.5F4

Kento Ishigaki; Jun Gouchi; Kiyoshi Torizuka; Sonachalam Arumugam; Ashok Kumar Ganguli; Zeba Haque; Kalaiselven Ganesan; Gohil Singh Thakur; Yoshiya Uwatoko

doi:10.7566/JPSJ.93.024706

Pressure-induced Superconductivity in BiS₂-based Superconductors Eu₂SrBi₂S_2.5Se_1.5F₄

Kento Ishigaki, Jun Gouchi, Kiyoshi Torizuka, Sonachalam Arumugam, Ashok Kumar Ganguli, Zeba Haque, Kalaiselven Ganesan, Gohil Singh Thakur, Yoshiya Uwatoko

Department of Applied Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

BiS₂-based superconductor Eu₂SrBi₂S_2.5Se_1.5F₄ has been investigated to clarify between T_c and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, T_c increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure, T_c exhibited a peak again at 4 GPa. These experimental results suggest the existence of pressure-induced multiple superconducting phases in Eu₂SrBi₂S_2.5Se_1.5F₄. By XRD measurements, we can find that pressure-induced structural phase transitions occur near the pressure in the observation of T_c discontinuities. These results indicate the emergence of new superconducting phases through structural phase transitions. Eu₂SrBi₂S_2.5Se_1.5F₄ was found to have three superconducting phases up to 12 GPa.

Original language	English
Article number	024706
Journal	journal of the physical society of japan
Volume	93
Issue number	2
DOIs	https://doi.org/10.7566/JPSJ.93.024706
Publication status	Published - 15 Feb 2024

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title = "Pressure-induced Superconductivity in BiS2-based Superconductors Eu2SrBi2S2.5Se1.5F4",

abstract = "BiS2-based superconductor Eu2SrBi2S2.5Se1.5F4 has been investigated to clarify between Tc and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, Tc increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure, Tc exhibited a peak again at 4 GPa. These experimental results suggest the existence of pressure-induced multiple superconducting phases in Eu2SrBi2S2.5Se1.5F4. By XRD measurements, we can find that pressure-induced structural phase transitions occur near the pressure in the observation of Tc discontinuities. These results indicate the emergence of new superconducting phases through structural phase transitions. Eu2SrBi2S2.5Se1.5F4 was found to have three superconducting phases up to 12 GPa.",

author = "Kento Ishigaki and Jun Gouchi and Kiyoshi Torizuka and Sonachalam Arumugam and Ganguli, {Ashok Kumar} and Zeba Haque and Kalaiselven Ganesan and Thakur, {Gohil Singh} and Yoshiya Uwatoko",

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doi = "10.7566/JPSJ.93.024706",

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T1 - Pressure-induced Superconductivity in BiS2-based Superconductors Eu2SrBi2S2.5Se1.5F4

AU - Ishigaki, Kento

AU - Gouchi, Jun

AU - Torizuka, Kiyoshi

AU - Arumugam, Sonachalam

AU - Ganguli, Ashok Kumar

AU - Haque, Zeba

AU - Ganesan, Kalaiselven

AU - Thakur, Gohil Singh

AU - Uwatoko, Yoshiya

PY - 2024/2/15

Y1 - 2024/2/15

N2 - BiS2-based superconductor Eu2SrBi2S2.5Se1.5F4 has been investigated to clarify between Tc and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, Tc increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure, Tc exhibited a peak again at 4 GPa. These experimental results suggest the existence of pressure-induced multiple superconducting phases in Eu2SrBi2S2.5Se1.5F4. By XRD measurements, we can find that pressure-induced structural phase transitions occur near the pressure in the observation of Tc discontinuities. These results indicate the emergence of new superconducting phases through structural phase transitions. Eu2SrBi2S2.5Se1.5F4 was found to have three superconducting phases up to 12 GPa.

AB - BiS2-based superconductor Eu2SrBi2S2.5Se1.5F4 has been investigated to clarify between Tc and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, Tc increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure, Tc exhibited a peak again at 4 GPa. These experimental results suggest the existence of pressure-induced multiple superconducting phases in Eu2SrBi2S2.5Se1.5F4. By XRD measurements, we can find that pressure-induced structural phase transitions occur near the pressure in the observation of Tc discontinuities. These results indicate the emergence of new superconducting phases through structural phase transitions. Eu2SrBi2S2.5Se1.5F4 was found to have three superconducting phases up to 12 GPa.

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Pressure-induced Superconductivity in BiS₂-based Superconductors Eu₂SrBi₂S_2.5Se_1.5F₄

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